Suppose a certain scale is not calibrated correctly, and as a result, the mass of any object is displayed as 0.75 kilogram less than its actual mass. what is the correlation between the actual masses of a set of objects and the respective masses of the same set of objects displayed by the scale?

The correlation between the actual masses of a set of objects and the respective masses of the same set of objects displayed by the scale will be linear and complementary.

Since the scale is not calibrated correctly, this will eventually result to a systematic uncertainty or error. In this case, all the reading of the masses displayed are 0.75kg less than their actual masses.

Systematic error cannot be eliminated by repeating readings and then averaging. It can only be reduced by improving experimental techniques.

More example of Systematic error are

* Zero error on an instrument

* Wrongly calibrated scale

* Reaction time of experiment

When the actual mass reading is plotted with the respective mass, the correlation between the actual masses of a set of objects and the respective masses of the same set of objects displayed by the scale will be linear and complementary.

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